Brazil Crayfish

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The family Parastacidae, in South America, is represented by three genera: (1) Parastacus, (2) Samastacus and (3) Virilastacus. Six crayfish species occur in temperate regions of Brazil, more precisely in the southernmost States, Rio Grande do Sul and Santa Catarina, all of them belonging to the genus Parastacus. These species burrow in two types of habitat: swampy grounds and muddy banks of small lotic systems. They have a seasonal reproduction, that starts in the early spring and stops in the late summer. Intersexuality and hermaphroditism are common phenomena in Parastacus. All Brazilian species have male and female genital apertures. The bigger species are P. pilimanus and P. brasiliensis, but they rarely reach a size over 10cm.

Parastacus pilimanus is a strongly burrowing species too, with habitat and habits very close to P. defossus. Crayfish of different ages inhabit a same burrow like P. defossus. The name of the species is due the existence of a well developed pilosity in the cutting edge of the cheliped. Intersexed, not hermaphrodite species.
Geographic distribution: Rio Grande do Sul, Uruguay and north east of Argentina.

 

 

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